| 제목 |
MODEL-BASED CONTROL SYSTEM DESIGN IN A UREA-SCR AFTERTREATMENT SYSTEM BASED ON NH3 SENSOR FEEDBAC |
| 분야 |
Engine and Emissions |
| 언어 |
English |
| 저자 |
M. DEVARAKONDA(Michigan Technological University), G. PARKER(Michigan Technological University), J. H. JOHNSON(Michigan Technological University), V. STROTS(Navistar Inc.) |
| Key Words |
Urea-SCR catalyst, Model-based estimation, Observer, Control system design, NH3 sensor, Sliding mode control |
| 초록 |
This paper presents preliminary control system simulation results in a urea-selective catalytic reduction (SCR) aftertreatment system based on NH3 sensor feedback. A four-state control-oriented lumped parameter model is used to analyze the controllability and observability properties of the urea-SCR plant. A model-based estimator is designed via simulation and a control system is developed with design based on a sliding mode control framework. The control system based on NH3 sensor feedback is analyzed via simulation by comparing it to a control system developed based on NOx sensor feedback. Simulation results show that the NH3 sensor-based strategy performs very similarly in comparison to a NOx sensor-based strategy. The control system performance metrics for NOx index, urea index, urea usage, and NH3 slip suggest that the NOx sensor can be a potential alternative to a NOx sensor for urea-SCR control applications. |
| 미리보기 |
다운로드
|
| 원문(PDF) |
다운로드
|
